Rework cfg #14
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Rework cfg #14
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Significant architecture changes are:
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gsvgit
reviewed
Dec 9, 2024
| def is_parsable(self, word: Iterable[Hashable], left: bool = True) -> bool: | ||
| """ | ||
| Whether a word is parsable or not | ||
| productions: Iterable[FeatureProduction] = None): | ||
| variables: AbstractSet[Hashable] = None, | ||
| terminals: AbstractSet[Hashable] = None, | ||
| start_symbol: Hashable = None, |
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What the problem to make start_symbol has type Variable? Current type looks not pretty specific.
| from ..formal_object import FormalObject | ||
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| class Terminal(CFGObject): |
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Can it be unified over all regexps, grammars, etc? Terminal is a common thing for all language-related formalisms.
| Parameters | ||
| ----------- | ||
| value : any |
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Can variable be unified over all cfg-related formalisms?
| Parameters | ||
| ---------- | ||
| given : any |
gsvgit
reviewed
Feb 13, 2025
| Parameters | ||
| ----------- | ||
| value : any |
| Parameters | ||
| ----------- | ||
| value : any |
| """ A state in a finite automaton | ||
| Parameters | ||
| ---------- |
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…ration, add missing pda methods
…import cycles, correct types in get_words
…ions, add base epsilon class
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Here we plan to rework
cfgand some related modules, removing cycles and adding type annotations. Modules we should consider are:cfg;pda;fcfg.Changes by module:
objects:State,Terminal, etc.) to a separate module to improve the structure of the project and handle some design issues.FormalObjectclass.StackSymbolfromSymbolandEpsilonfromStackSymbolto handle some type mismatches.cfg:to_pdamethod fromCFGclass, addfrom_cfgmethod for pda instead.FormalGrammarabstract class to handle import cycles in cfg module, generalize some methods and properties.add_productionmethod for grammars, add methods for changing start symbol of the grammar.pdamodule.fcfg:from_textmethod for FCFG using generics in theFormalGrammarclass.add_productionby converting the given rule toFeatureProductionclass, use that conversion in the constructor.pda:cfgmodule.utilsfile.